Kalshi KXMLBDEBUT — Pro Baseball Debut Data
Every Kalshi “Pro Baseball Debut” contract of the day — every trade print and the complete Level-2 book, captured co-located with nanosecond venue and receive timestamps. 182 trading days as day bundles, €1 per day, bought as a guest with instant download. Pro Baseball Debut is a season market — days exist when MLB plays, and coverage continues when the league trades again.
Pro Baseball Debut on Kalshi — activity
Trades and USD turnover summed over every contract of the series across 30 captured days to 2026-11-06, from the recorded tick data — the per-day averages divide by the captured days. Buy share, quoted spread (in contract price cents, 0..1 = 100 ¢), best-bid/ask depth and Level-2 update counts are turnover-weighted over the same window.
One purchase, the whole series for a day
A series-day bundle contains every Pro Baseball Debut contract that was listed on Kalshi on that UTC day — traded or not — 103 contract files on the latest covered day. Each file carries the full raw feed: every trade print with price, size and side, plus Level-2 order-book updates, in the same zstd-compressed schema as our crypto venues. Event contracts quote 0..1; turnover is USD-normalized.
Coverage runs May 2026 – present — 182 trading days, 183 MB compressed in total. A day typically holds 122 contract files (up to 146 on the busiest day, 6.40 MB). Pick individual days in the shop calendar for €1 each; delivery is an instant per-file download or one archive for the whole day.
Pro Baseball Debut — development since capture
3,371 trades and $100.3K of USD turnover over 122 captured days since 2026-07-08 — record day 2026-09-10 with $20.6K, biggest single contract KXMLBDEBUT-JDEPAULA-27MAY01 (MLBDEBUT · 27MAY01) (2026-09-10, $7.8K).
| Month | Days | Trades | Turnover (USD) | Avg / day | Contracts traded | L2 updates | vs previous month |
|---|---|---|---|---|---|---|---|
| Nov 2026 (month to date) | 6 | 20 | $135.45 | $22.58 | 12 | 164.7K | — |
| Oct 2026 | 31 | 170 | $1.9K | $60.61 | 105 | 611.4K | −95.1 % |
| Sep 2026 | 30 | 730 | $38.1K | $1.3K | 155 | 577.4K | −5.8 % |
| Aug 2026 | 31 | 911 | $40.4K | $1.3K | 197 | 614.1K | +103.4 % |
| Jul 2026 | 24 | 1,540 | $19.9K | $827.11 | — | — | — |
Kalshi Pro Baseball Debut — trades and USD turnover summed per calendar month (UTC) over every contract, from our own daily statistics of the recorded tick data. Days = captured UTC days; a partial month shows no month-over-month change. Contracts traded and L2 (order-book) updates exist for days captured with the extended statistics.
MLB markets on other prediction venues
Polymarket, predict.fun, OG.com also list MLB event markets — the same 30-day statistics side by side, each a day bundle of its own.
| Venue · series | Trades (30d) | Turnover (30d) | Avg spread | Top-1 depth | L2 updates / trade | Days archived | Price / day |
|---|---|---|---|---|---|---|---|
| Kalshi · Pro Baseball Debut (this page) | 136 | $1.7K | 13.6 ¢ | $72.8 | 4585.1 | 182 | €1 |
| Polymarket · MLB (games & props) | 61,644 | $14.8M | 2.17 ¢ | $62.9K | 749.1 | 414 | €1 |
| predict.fun · MLB (games & props) | 8,017 | $712.2K | 1.49 ¢ | $32.8K | 231.6 | 21 | €1 |
| OG.com · MLB (games & props) | 112,102 | $6.6M | 2.07 ¢ | $61.7K | 265.8 | 24 | €1 |
30-day window of the statistics table, per venue's own series; spread in contract-price cents and best-bid/ask depth are turnover-weighted, L2 updates per trade = recorded order-book level updates ÷ trades. "—" = no statistics row in the window. Each venue settles its own contracts on its own rules — the series are comparable in subject, not interchangeable.
Pro Baseball Debut — activity by weekday
Tuesdays carry the most turnover, about $124.08 per day.
| Weekday (UTC) | Avg turnover / day | USD | Avg trades | Days |
|---|---|---|---|---|
| Monday | $53.85 | 5.75 | 4 | |
| Tuesday | $124.08 | 6.5 | 4 | |
| Wednesday | $12.1 | 2.5 | 4 | |
| Thursday | $118.46 | 7.2 | 5 | |
| Friday | $2.82 | 2 | 5 | |
| Saturday | $74.27 | 3.75 | 4 | |
| Sunday | $11.41 | 4 | 4 |
Kalshi Pro Baseball Debut — average USD turnover and trades per weekday over the captured days of the last 30, from our own daily statistics; weekdays without a captured day show —.
Pro Baseball Debut — last 30 days in the archive
Files, size, contracts traded, trades, USD turnover, buy share, quoted spread, top-of-book depth and order-book updates per UTC day, from the recorded tick data.
| UTC day | Files | Size | Traded | Trades | Turnover | Buy share | Avg spread | Top-1 depth | L2 updates | Notes | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-11-06 | 103 | 1.35 MB | 1 | 1 | $4.83 | 100 % | 8.24 ¢ | $68.55 | 36.1K | Buy day → | |
| 2026-11-05 | 103 | 1.23 MB | 3 | 6 | $23.87 | 0 % | 8.10 ¢ | $94.37 | 32.5K | Buy day → | |
| 2026-11-04 | 103 | 1.04 MB | 2 | 2 | $40.97 | 100 % | 15.6 ¢ | $26.36 | 27.8K | Buy day → | |
| 2026-11-03 | 103 | 857 KB | 3 | 7 | $53.64 | 64 % | 7.47 ¢ | $50.29 | 21.5K | Buy day → | |
| 2026-11-02 | 103 | 965 KB | 1 | 2 | $9.66 | 100 % | 8.19 ¢ | $54.84 | 25.0K | Buy day → | |
| 2026-11-01 | 110 | 912 KB | 2 | 2 | $2.48 | 100 % | 8.35 ¢ | $84.75 | 21.7K | Buy day → | |
| 2026-10-31 | 110 | 879 KB | 3 | 4 | $28.73 | 100 % | 7.06 ¢ | $15.93 | 19.7K | Buy day → | |
| 2026-10-30 | 110 | 1.01 MB | 0 | 0 | $0 | — | — | — | 25.5K | Buy day → | |
| 2026-10-29 | 110 | 869 KB | 3 | 4 | $270 | 37 % | 20.6 ¢ | $97.89 | 19.7K | Buy day → | |
| 2026-10-28 | 110 | 812 KB | 1 | 2 | $0.65 | 77 % | 1.00 ¢ | $3.43 | 19.5K | Buy day → | |
| 2026-10-27 | 110 | 1.02 MB | 3 | 4 | $25.53 | 100 % | 4.78 ¢ | $6.83 | 25.3K | Buy day → | |
| 2026-10-26 | 110 | 987 KB | 11 | 17 | $94.47 | 100 % | 3.18 ¢ | $4.8 | 22.4K | Buy day → | |
| 2026-10-25 | 110 | 746 KB | 5 | 7 | $4.54 | 29 % | 8.51 ¢ | $55.99 | 15.4K | Buy day → | |
| 2026-10-24 | 110 | 688 KB | 1 | 1 | $0.82 | 0 % | 7.71 ¢ | $28.87 | 15.2K | Buy day → | |
| 2026-10-23 | 110 | 813 KB | 1 | 2 | $1.35 | 27 % | 2.00 ¢ | $1.84 | 17.0K | Buy day → | |
| 2026-10-22 | 110 | 853 KB | 6 | 16 | $289.41 | 86 % | 7.69 ¢ | $98.54 | 18.1K | Buy day → | |
| 2026-10-21 | 110 | 836 KB | 3 | 6 | $6.8 | 72 % | 8.59 ¢ | $71.77 | 17.3K | Buy day → | |
| 2026-10-20 | 110 | 791 KB | 4 | 5 | $294.51 | 22 % | 6.23 ¢ | $66.94 | 17.2K | Buy day → | |
| 2026-10-19 | 110 | 851 KB | 1 | 1 | $1.18 | 100 % | — | — | 19.2K | Buy day → | |
| 2026-10-18 | 110 | 772 KB | 3 | 5 | $5.55 | 97 % | 8.05 ¢ | $73.55 | 16.4K | Buy day → | |
| 2026-10-17 | 110 | 722 KB | 2 | 2 | $122.38 | 4 % | 8.81 ¢ | $116.21 | 15.4K | Buy day → | |
| 2026-10-16 | 110 | 728 KB | 4 | 5 | $6.84 | 61 % | 2.89 ¢ | $17.29 | 15.4K | Buy day → | |
| 2026-10-15 | 110 | 824 KB | 1 | 1 | $1.92 | 100 % | 10.0 ¢ | $52.51 | 17.0K | Buy day → | |
| 2026-10-14 | 110 | 779 KB | 0 | 0 | $0 | — | — | — | 16.8K | Buy day → | |
| 2026-10-13 | 110 | 838 KB | 7 | 10 | $122.64 | 6 % | 7.04 ¢ | $73.91 | 18.5K | Buy day → | |
| 2026-10-12 | 110 | 902 KB | 1 | 3 | $110.09 | 0 % | 63.7 ¢ | $37.63 | 20.1K | Buy day → | |
| 2026-10-11 | 110 | 780 KB | 1 | 2 | $33.05 | 0 % | 8.07 ¢ | $75.44 | 16.7K | Buy day → | |
| 2026-10-10 | 110 | 1021 KB | 5 | 8 | $145.14 | 37 % | 14.5 ¢ | $67.1 | 26.7K | Buy day → | |
| 2026-10-09 | 110 | 945 KB | 2 | 2 | $1.1 | 88 % | 7.93 ¢ | $71.57 | 22.1K | Buy day → | |
| 2026-10-08 | 110 | 980 KB | 8 | 9 | $7.11 | 70 % | 9.49 ¢ | $49.79 | 22.3K | Buy day → |
Traded = contracts with at least one trade that day. Buy share = taker-buy side of USD turnover. Avg spread = quoted bid-ask spread in contract price cents (0..1 = 100 ¢), weighted by turnover across the day’s contracts. Top-1 depth = mean of the best bid and best ask notional in USD, weighted by turnover. L2 updates = order-book level updates recorded across all contracts of the day. Days captured before the extended statistics show —.
Most traded Pro Baseball Debut contracts by day
The ten contracts with the most USD turnover per UTC day — open, high, low, close, VWAP and the outcome implied by the last print; the six previous days fold out below.
The 1 most traded Pro Baseball Debut contracts on 2026-11-06 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 1 still open at the last print: 1 trades, $4.83 USD turnover. The busiest contract was KXMLBDEBUT-JFLORA-28NOV01 with $4.83 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBDEBUT-JFLORA-28NOV01 MLBDEBUT · 28NOV01 | 0.490 | 0.490 | 0.490 | 0.490 | 0.490 | open | 1 | $4.83 | 100 % | 8.24 ¢ | $68.55 | 511 | buy file → |
Prices quote 0..1 (probability of Yes). Open/high/low/close/VWAP are that UTC day’s trade prints per contract; the implied outcome reads the last print — ≥ 0.97 as Yes, ≤ 0.03 as No, anything between as still open — venues publish the official result. Buy share = taker-buy side of turnover; spread = the contract's turnover-weighted quoted bid-ask spread in cents, top-1 depth = mean best-bid/ask notional per side, L2 updates = order-book level updates recorded for the contract that day. “Settles” is the venue-listed close time of the contract where the venue publishes one (UTC).
2026-11-05 — 3 contracts, 6 trades, $23.87 turnover
The 3 most traded Pro Baseball Debut contracts on 2026-11-05 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 3 still open at the last print: 6 trades, $23.87 USD turnover. The busiest contract was KXMLBDEBUT-VLACKEY-30MAY01 with $11.53 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBDEBUT-VLACKEY-30MAY01 MLBDEBUT · 30MAY01 | 0.830 | 0.830 | 0.820 | 0.820 | 0.824 | open | 3 | $11.53 | 0 % | 8.41 ¢ | $103.58 | 249 | buy file → |
| KXMLBDEBUT-VLACKEY-29NOV01 MLBDEBUT · 29NOV01 | 0.820 | 0.820 | 0.810 | 0.810 | 0.814 | open | 2 | $10.58 | 0 % | 7.50 ¢ | $89.69 | 306 | buy file → |
| KXMLBDEBUT-VLACKEY-28NOV01 MLBDEBUT · 28NOV01 | 0.440 | 0.440 | 0.440 | 0.440 | 0.440 | open | 1 | $1.76 | 0 % | 9.70 ¢ | $62.18 | 286 | buy file → |
2026-11-04 — 2 contracts, 2 trades, $40.97 turnover
The 2 most traded Pro Baseball Debut contracts on 2026-11-04 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 2 still open at the last print: 2 trades, $40.97 USD turnover. The busiest contract was KXMLBDEBUT-LDEVRIES-27MAY01 with $40 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBDEBUT-LDEVRIES-27MAY01 MLBDEBUT · 27MAY01 | 0.180 | 0.200 | 0.180 | 0.200 | 0.200 | open | 1 | $40 | 100 % | 15.8 ¢ | $25.65 | 8.1K | buy file → |
| KXMLBDEBUT-ZHOPE-27AUG01 MLBDEBUT · 27AUG01 | 0.540 | 0.540 | 0.540 | 0.540 | 0.540 | open | 1 | $0.97 | 100 % | 8.01 ¢ | $55.58 | 238 | buy file → |
2026-11-03 — 3 contracts, 7 trades, $53.64 turnover
The 3 most traded Pro Baseball Debut contracts on 2026-11-03 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 3 still open at the last print: 7 trades, $53.64 USD turnover. The busiest contract was KXMLBDEBUT-JFLORA-28NOV01 with $29.31 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBDEBUT-JFLORA-28NOV01 MLBDEBUT · 28NOV01 | 0.480 | 0.490 | 0.480 | 0.490 | 0.487 | open | 5 | $29.31 | 100 % | 7.33 ¢ | $68.36 | 577 | buy file → |
| KXMLBDEBUT-JMADE-27MAY01 MLBDEBUT · 27MAY01 | 0.290 | 0.290 | 0.290 | 0.290 | 0.290 | open | 1 | $19.46 | 0 % | 7.46 ¢ | $14.95 | 201 | buy file → |
| KXMLBDEBUT-JMADE-27AUG01 MLBDEBUT · 27AUG01 | 0.610 | 0.610 | 0.610 | 0.610 | 0.610 | open | 1 | $4.87 | 100 % | 8.40 ¢ | $82.8 | 349 | buy file → |
2026-11-02 — 1 contract, 2 trades, $9.66 turnover
The 1 most traded Pro Baseball Debut contracts on 2026-11-02 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 1 still open at the last print: 2 trades, $9.66 USD turnover. The busiest contract was KXMLBDEBUT-JFLORA-28NOV01 with $9.66 turnover.
| Contract | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBDEBUT-JFLORA-28NOV01 MLBDEBUT · 28NOV01 | 0.480 | 0.480 | 0.480 | 0.480 | 0.480 | open | 2 | $9.66 | 100 % | 8.19 ¢ | $54.84 | 385 | buy file → |
2026-11-01 — 2 contracts, 2 trades, $2.48 turnover
The 2 most traded Pro Baseball Debut contracts on 2026-11-01 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 2 still open at the last print: 2 trades, $2.48 USD turnover. The busiest contract was KXMLBDEBUT-JMADE-27AUG01 with $2.43 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBDEBUT-JMADE-27AUG01 MLBDEBUT · 27AUG01 | — | 0.610 | 0.610 | 0.610 | 0.610 | 0.610 | open | 1 | $2.43 | 100 % | 8.44 ¢ | $84.75 | 419 | buy file → |
| KXMLBDEBUT-AMILLER-26NOV01 MLBDEBUT · 26NOV01 | 2026-11-01 05:02 | 0.010 | 0.050 | 0.010 | 0.050 | 0.050 | open | 1 | $0.05 | 100 % | 4.00 ¢ | — | 180 | buy file → |
2026-10-31 — 3 contracts, 4 trades, $28.73 turnover
The 3 most traded Pro Baseball Debut contracts on 2026-10-31 — 0 closed Yes (≥ 0.97), 1 closed No (≤ 0.03), 2 still open at the last print: 4 trades, $28.73 USD turnover. The busiest contract was KXMLBDEBUT-SWALCOTT-27MAY01 with $18.99 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBDEBUT-SWALCOTT-27MAY01 MLBDEBUT · 27MAY01 | — | 0.230 | 0.240 | 0.230 | 0.240 | 0.240 | open | 1 | $18.99 | 100 % | 6.72 ¢ | $2.79 | 200 | buy file → |
| KXMLBDEBUT-JMADE-27AUG01 MLBDEBUT · 27AUG01 | — | 0.530 | 0.610 | 0.530 | 0.610 | 0.610 | open | 2 | $9.73 | 100 % | 7.73 ¢ | $41.57 | 167 | buy file → |
| KXMLBDEBUT-AMILLER-26NOV01 MLBDEBUT · 26NOV01 | 2026-11-01 05:02 | 0.050 | 0.050 | 0.010 | 0.010 | 0.010 | No | 1 | $0.01 | 0 % | 4.00 ¢ | $0.93 | 1.1K | buy file → |
MLB on Kalshi — market types across the series
Across 72 MLB series on Kalshi, 883,363 contracts have been listed as of 2026-11-06: player & team props 601,750 · total / over-under 90,394 · spread / handicap 30,874 · moneyline / winner 21,002 and others. Counted from every contract file of the family, not from the traded top-10.
| Market type | Contracts listed (all time) | Listed last 30 days | Share |
|---|---|---|---|
| player & team props | 601,750 | 5,393 | 68 % |
| total / over-under | 90,394 | 1,129 | 10 % |
| spread / handicap | 30,874 | 266 | 3 % |
| moneyline / winner | 21,002 | 881 | 2 % |
| period markets | 14,547 | 204 | 2 % |
| strike ladder | 212 | 0 | 0 % |
| other | 124,584 | 2,590 | 14 % |
| Total | 883,363 | 10,463 | 100 % |
Kalshi MLB series— market type read from each contract's venue identifier (ticker suffix on Kalshi, slug suffix on Polymarket, market description on predict.fun and OG.com), counted over every contract listed in the family as of 2026-11-06; “listed last 30 days” counts contracts whose venue settlement time falls in that window. Every one of them is in the day bundle of its day.
How a Pro Baseball Debut contract trades
On Kalshi, a Pro Baseball Debut contract trades until its event settles, is listed roughly 12 min before it opens, and quotes in 1 ¢ price steps (0..1). Measured on the 1 contracts captured on 2026-11-06.
Try a Pro Baseball Debut contract file for free
The busiest contract of a settled day, byte-identical to the files in the paid bundle — download the native tick file, a CSV/Parquet export, or replay its order book in the browser.
KXMLBDEBUT-FARIAS-28NOV01 minute by minute — 2026-10-29
One-minute open/high/low/close, trades, USD turnover, quoted spread and top-of-book depth of the sample contract — the same 1-minute statistics every instrument’s analytics page offers.
KXMLBDEBUT-FARIAS-28NOV01 traded in 1 of the day’s minutes (19:31–19:31 UTC): 2 trades, $169.35 turnover, opening at 0.970, ranging 0.900–0.910 and closing at 0.900.
| Minute (UTC) | Open | High | Low | Close | Trades | Turnover | Spread | Top-1 bid / ask |
|---|---|---|---|---|---|---|---|---|
| 19:31 | 0.970 | 0.910 | 0.900 | 0.900 | 2 | $169.35 | 12.4 ¢ | $6.83 / $181.73 |
1-minute statistics computed from the recorded ticks; minutes without a trade are omitted. Spread in contract price cents; top-1 depth = resting notional at the best bid / best ask. Every minute of every day is in the free analytics; the raw ticks are in the sample file above.
Build a Pro Baseball Debut model on this data
Every settled Pro Baseball Debut contract is a labelled example: the winner, the line or the total that cleared is the label, and the day bundle holds each contract's full order-book path and trade tape, nanosecond-stamped, from the first quote days before the event to the last print — the features for that label. The statistics on this page cover the most traded contracts per day; the bundle holds every contract listed on Kalshi that day.
Split by season and match day, never at random — the contracts of one slate share injuries, weather and the same public money, and a random split leaks the slate's results into training; walk forward over game days and purge the days whose contracts were still open. The sports-model guide works the closing-line benchmark, the pre-game line path and that split through.
Purchased data is for your own use — backtesting, research, analytics and training your own models, in-house or in your own products; the trained models and derived data you build from it are yours. The raw files and tick streams themselves may not be redistributed, resold or published. The full terms are on the data license page.
Why buy Kalshi Pro Baseball Debut data here
Four things every page on this site is built on — and the reason the numbers above exist at all.
We record everything
The complete public feed of each venue as it was published: every Level-2 snapshot and update at the venue's full book depth, every trade with its aggressor side, every quote, funding, mark-price and liquidation event — for every instrument the venue lists, every UTC day since we added the venue. Nothing sampled, no top-N cut, no on-demand capture.
Institutional grade
Captured co-located at the venue with the exchange timestamp and our receive timestamp in integer nanoseconds, an event-id chain that makes any gap visible, and one normalized schema across 35+ venues — the same capture our own high-frequency trading engine and enterprise feeds run on.
€1 per instrument-day
Any instrument-day is €1, series-day bundles start at €1 — no subscription, no minimum order, no tiers to unlock. Credit packs lower the effective price and never expire, and free full-day samples from the major venues let you test first.
Self-service for everyone
Pick the days in the Data Shop, pay by card as a guest and download immediately — no sales call, no enterprise contract, no KYC. Coding agents buy the same files through the MCP server, and the free Agent Skill teaches them the format.
Agents: /llms.txt · MCP server /mcp · every page as markdown via Accept: text/markdown
Kalshi Pro Baseball Debut data — FAQ
What Kalshi Pro Baseball Debut data can I download?
Tick-by-tick trades and Level-2 order-book depth for every contract of the Pro Baseball Debut series on Kalshi (103 contract files on the latest day). One bundle = one UTC day of the whole series.
What is the Kalshi series ticker for Pro Baseball Debut?
KXMLBDEBUT — every contract of the series carries this prefix in its ticker (followed by the event date and strike). Files in a day bundle are named by the full contract ticker, so a bundle holds every KXMLBDEBUT-* contract listed that UTC day.
How far back does the Pro Baseball Debut data go?
Coverage runs May 2026 – present — 182 trading days in total. Pro Baseball Debut is a season market: days exist when MLB plays, and coverage continues when the league trades again.
What format are the Kalshi files in?
One zstd-compressed text file per contract per UTC day, in the same normalized schema as our crypto venues — see the market-data specification; free samples on the downloads page.
Can I get Kalshi Pro Baseball Debut data as CSV or Parquet?
Yes — trades export as gzipped CSV or Parquet at no extra cost, with integer microsecond UTC timestamps that load straight into pandas, polars or DuckDB. Kalshi records full order-book depth without a separate BBO stream, so book data ships in the native tick file — the free reader script converts it locally. See the formats overview.
How much does Kalshi Pro Baseball Debut historical data cost?
€1 per series-day bundle — every contract of the series for that day — no subscription, no minimum order; buy as a guest in the Data Shop and download immediately. Credit packs lower the effective price and never expire.
Do I need an account or a sales call?
No. Pick the Pro Baseball Debut series-days in the Data Shop, pay by card as a guest and download immediately — no subscription, no minimum order, no KYC, no enterprise contract, no sales call. Coding agents buy the same bundles through the MCP server.
How is the Kalshi Pro Baseball Debut data captured?
Co-located at the venue, message by message: every Level-2 update and every trade print carries the exchange timestamp and our receive timestamp in integer nanoseconds, an event-id chain makes any gap visible, and one normalized schema across 35+ venues means a parser written for Binance reads these files unchanged. It is the same capture our own high-frequency trading engine runs on — nothing sampled, no top-N cut.
How many Pro Baseball Debut contracts trade per day on Kalshi?
On average 3 Pro Baseball Debut contracts had at least one trade per UTC day over the last 30 captured days on Kalshi, with about 20.8K order-book level updates recorded per day. A day bundle contains every contract file of the series for that day.
How liquid are Kalshi Pro Baseball Debut contracts?
Over the last 30 captured days, the turnover-weighted quoted bid-ask spread was 13.6 ¢ (contracts quote 0..1 = 100 ¢), the mean best-bid/best-ask notional was about $72.8 per side, 44 % of USD turnover was taker-buy. These figures are computed from the recorded Level-2 order books and trade prints — the same data in the day bundles.
What was the most traded Pro Baseball Debut contract on 2026-11-06?
KXMLBDEBUT-JFLORA-28NOV01 (MLBDEBUT · 28NOV01) — $4.83 USD turnover over 1 trade on Kalshi. The 1 most traded contracts of the series did 1 trades and $4.83 that UTC day. Open, high, low, close and VWAP per contract are listed on this page; the tick-level data is in the day bundle.
What was the busiest Pro Baseball Debut trading day on Kalshi?
2026-09-10, with $20.6K of USD turnover over 283 trades across every Pro Baseball Debut contract of the day; the busiest full month was Aug 2026 at $40.4K. Since our statistics began on 2026-07-08 the series has recorded 3,371 trades and $100.3K over 122 captured days; the single biggest contract was KXMLBDEBUT-JDEPAULA-27MAY01 (MLBDEBUT · 27MAY01) on 2026-09-10 with $7.8K. Any of these days is a downloadable bundle.
Which market types does Kalshi list for MLB?
Kalshi lists each market type as its own series — 72 MLB series with 883,363 contracts listed as of 2026-11-06: player & team props 601,750 · total / over-under 90,394 · spread / handicap 30,874 · moneyline / winner 21,002 · period markets 14,547. Pro Baseball Debut is one of them; a series-day bundle covers one series, so buy the same day across the sibling series you need in the shop.
Which weekday does Kalshi Pro Baseball Debut trade most?
Tuesdays — about $124.08 of USD turnover per Tuesday and 29 % of the series' turnover over the 30 captured days to 2026-11-06 on Kalshi, summed from every trade print of the series' contracts. The weekday profile on this page shows all seven days; the day bundles carry the full tape behind them.
How much of Pro Baseball Debut turnover trades on game day?
25 % — across 27 settled Pro Baseball Debut contracts between 2026-08-09 and 2026-11-06 on Kalshi, 25 % of their USD turnover printed on the UTC day the contract settled and 75 % on the days before, summed from every trade of the most traded contracts per day. The pre-event share is where line-movement features live; the day bundles hold both.
How long before an event do Pro Baseball Debut contracts trade?
A median of 3 captured trading days per contract, settlement day included (a quarter traded 9 days or more) — across 27 settled Pro Baseball Debut contracts to 2026-11-06 on Kalshi, counting the UTC days a contract ranked among the series' most traded. Buy those days as a range (/shop/bundles?bundle=kalshi-kxmlbdebut&d=<from>..<to>) to get the whole pre-event path of each contract.